Title:
OPTICAL FILTER AND INFORMATION ACQUISITION DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/004641
Kind Code:
A1
Abstract:
The present invention relates to an optical filter and an information acquisition device provided with the optical filter. The optical filter is provided with an absorption layer, a reflection layer, and a transparent substrate, and has, in a spectral transmittance curve at an incident angle of 0°: a wavelength at which transmittance becomes 50% in a wavelength region of 640-760 nm; an average transmittance of 3% or less at wavelengths of 750-1100 nm; a wavelength at which transmittance becomes 50% in a wavelength region of 400-420 nm; an average transmittance of 68% or more at wavelengths of 640-660 nm; and a minimum transmittance of 65% or more.
Inventors:
HASEGAWA MAKOTO (JP)
SHIONO KAZUHIKO (JP)
NAGATA TAKASHI (JP)
SHIONO KAZUHIKO (JP)
NAGATA TAKASHI (JP)
Application Number:
PCT/JP2019/025903
Publication Date:
January 02, 2020
Filing Date:
June 28, 2019
Export Citation:
Assignee:
AGC INC (JP)
International Classes:
G02B5/22; B32B7/023; B32B17/10; B32B27/18; C09B23/14; C09B57/00; G02B5/28
Domestic Patent References:
| WO2014168190A1 | 2014-10-16 | |||
| WO2018088561A1 | 2018-05-17 | |||
| WO2017022708A1 | 2017-02-09 | |||
| WO2017135359A1 | 2017-08-10 |
Foreign References:
| JP2016157123A | 2016-09-01 | |||
| JP2007101729A | 2007-04-19 | |||
| JP2012117030A | 2012-06-21 | |||
| JP2007526379A | 2007-09-13 |
Attorney, Agent or Firm:
EIKOH PATENT FIRM, P.C. (JP)
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